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In a family, there are six members named K, L, M, N, O and P. N's age is three times the age of L. The age of O is equal to the total age of L and M.
Question

In a family, there are six members named K, L, M, N, O and P. N's age is three times the age of L. The age of O is equal to the total age of L and M. P's age is equal to the total age of K and N. K's age is half the age of M. P is one year elder than O. The sum of the ages of K and M is 45 years. The sum of ages of N and L is 32 years.
Which of the following is true based on the given information?
I. The age of P is 41 years.
II. O is 21 years elder than K.​​​​​

A.

Only I

B.

Both I and II

C.

Neither I nor II

D.

Only II

Correct option is C

Given
1. N's age is 3 times L's
2. O's age = L + M
3. P = K + N
4. K = half of M
5. P is 1 year older than O
6. K + M = 45
7. N + L = 32
From point 4 and 6:
​K = 12\frac {1}{2}​M
So, K + M = 45
12\frac {1}{2}​M + M = 45
1.5 M = 45
M = 30
K = 12\frac {1}{2}​ × 30 = 15
From point 1 and 7:
N = 3 × L
So, N + L = 32
3L + L = 32
4L = 32
L = 8
N = 3 × 8 = 24
From point 2:
O = L + M = 8 + 30 = 38
From point 3:
P = K + N = 15 + 24 = 39
From point 5:
P = O + 1 = 38 + 1 = 39
Final Ages:
K = 15, L = 8, M = 30, N = 24, O = 38, P = 39
I. The age of P is 41 years. (False)
II. O is 21 years elder than K. (False)
Neither  I or II.
Thus, correct option is (c).

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